Randy –
I’m not the one with issues, it was Alan. I just offered up my experience for his comparison. 73 Lyn, WØLEN From: Ted Edwards W3TB [mailto:w3tb....@gmail.com] Sent: Friday, April 10, 2020 10:32 AM To: Randy Farmer Cc: l...@lnainc.com; elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA 500 I am watching this with great interest. If running stations on CW my KPA500 shows low-mid 50sC and I have never known what it should be. Thanks everyone. On Fri, Apr 10, 2020 at 10:27 Randy Farmer <w...@windstream.net> wrote: If the initial VSWR is really measuring 1.00:1 with low power, that means the detected reflected power is exceptionally low. I'm sure the algorithm used to compute SWR sets it to 1:1 if there's zero reflected power. If the load is not really perfectly flat, as the incident power is increased the detector will finally see enough reflected energy to give an indication. You have absolutely nothing to worry about in your system. 73... Randy, W8FN On 4/10/2020 9:59 AM, Lyn Norstad wrote: > At 100w on 20m, my KAT500 Utility shows an SWR of 1.00 with the KPA500 on > Standby and temp around 38ºC. But as I switch the KPA to Operate and > increase the power to 300w the SWR goes up as high as 1.10. If I hold it > there (key down) long enough the KPA temp starts rising slowly. At about > 50ºC I can hear the fan picking up speed. By the time I get to 60ºC the fan > is at probably level 2 or 3. SWR is still at 1.10 (max). > Right or wrong, I've always assumed there is some slight heating in the > antenna system (Tuner, Balun, Lightning protection) although all components > after the tuner are rated at 5 KW. > 73 > Lyn, WØLEN ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w3tb....@gmail.com -- 73 de Ted Edwards, W3TB and GØPWW and thinking about operating CW: "Do today what others won't, so you can do tomorrow what others can't." ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
